again, at first dorothy vaughan thought this was a drill. the woman who took the video, which we just saw, just like all the others at work at inland regional center where she's a nurse, the staff works with clients and parents of clients 0 are sometimes angry. they have active shooter drills every month or so. quoting drill started. she texted her husband at around 11:00 a.m. she walked to a window and shot the video. law enforcement sprinting toward her building. oh, that is scary, a voice says calmly in the background. in the background somebody laughed. they're all geared up. the reality had still not set in she texted her husband again, well, it's real. and then a few minutes later, another message. we're in a locked office. mark vaughan said he told his wife to stay calm and not to panic. quoting they train for this. he said, standing outside police barricades wednesday afternoon. they know it's going to happen. and today, it did happen. at an inland regional center where they help the disabled. 670 employees, a couple hundred there to